An age-progressed image of what William Bradford Bishop Jr. might look like today. He would be 77.

HONOLULU (HawaiiNewsNow) -

The FBI is adding William Bradford Bishop Jr. to its "Ten Most Wanted Fugitives" list.

Bishop is a former State Department official who is accused of murdering his family more than 30 years ago.

The FBI says Bishop, Jr. allegedly bludgeoning to death his wife (age 37), mother (age 68), and three sons (ages 5, 10 and 14) in Bethesda, Maryland, on March 1, 1976. He then allegedly transported their bodies to Columbia, North Carolina, where he buried the bodies in a shallow grave and lit them on fire.

The FBI says Bishop was, and may still be, an avid outdoorsman, camper, and hiker.

Bishop has an American Studies degree from Yale University and a Master's Degree in Italian from Middlebury College in Vermont. He was known to read extensively and may have kept a diary or journal. A longtime insomniac, Bishop reportedly had been under psychiatric care in the past and had used medication for depression. He drank scotch and wine and enjoyed eating peanuts and spicy food. Bishop was described as intense and self-absorbed, prone to violent outbursts, and preferred a neat and orderly environment.

The FBI is offering a reward of up to $100,000 for information leading directly to the arrest of William Bradford Bishop, Jr.

There is no indication that Bishop is in Hawaii or the Pacific.

If you have any information concerning the whereabouts of Bishop, please contact the Honolulu Field Office at 808-566-4300.